refactor(community): extract comment store and post/comment API adapters

components/post-comment-count.tsx

@@ -0,0 +1,21 @@
+"use client"
+
+import { MessageCircle } from "lucide-react"
+import { useCommentStore } from "@/store/comments"
+
+interface PostCommentCountProps {
+  postId: string
+}
+
+export function PostCommentCount({ postId }: PostCommentCountProps) {
+  const count = useCommentStore(
+    (state) => state.comments.filter((comment) => comment.postId === postId).length,
+  )
+
+  return (
+    <span className="flex items-center gap-1">
+      <MessageCircle className="h-4 w-4" />
+      {count}
+    </span>
+  )
+}